IRAS 19227+1700: carbon-rich or oxygen-rich star ?

Details IRAS 19227+1700: carbon-rich or oxygen-rich star ? IRAS 19227+1700: carbon-rich or oxygen-rich star ?

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003acasn..44....3c&link_type=abstract

Acta Astronomica Sinica, vol. 44, no. 1, p. 3-7.

Astronomy and Astrophysics

Astronomy

Stars: Agb, Stars: Abundances, Infraed: Stars, Radio Lines: Stars

Scientific paper

IRAS 19227+1700 is listed as a carbon star in the new carbon star catalog. However, this star is located in the region of the stars with rather thick oxygen-rich envelopes, but not in the typical region of the silicate carbon stars in the IRAS two-color diagram. Futhermore, there are evidences that IRAS 19227+1700 has not only the main line and satellite line OH maser emissions, but also the water maser emission which is close to the central star. The IRAS low-resolution spectrum of the star shows dust emission feature in the range of 9-12?m, and the near infrared. The observations verify that it has a hot circumstellar envelope. Therefore the envelope of IRAS 19227+1700 should be full oxygen-rich and it is very likely that the central star of it is also oxygen-rich.

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